The way to win in gambling, you have some good strategy so that you can win. Asides from that you know and understand what kinds of games you been play. So that you can win and you have a skills in that game. Just control yourself while you gamble so that you can concentrate too much, that can help you to win in gambling.
Even if you set a limit and having a good strategy still you cannot assure it that you must win in gambling, gambling is in fact totally depend on our luck, and no one can lucky for every time. some time you must lose your money in gambling. So we can only make some strategies and hope to make money in gambling but cannot become 100% sure about our win in gambling.